"William Gresham, alias Gilder, et al.," replied Mr. Riley.
"Good. But suppose I can prove to you that I am not the person you take me to be, and that my name is neither Gresham nor Gilder, et al., but that I am a civil engineer, William Brackett by name, brother-in-law of Major Caspar, whom I am certain you must know, and that you are making a rather sizable mistake in connection with this business. Supposing, also, I state that I am just now engaged on an important mission which will not admit of delay, and that in case you insist on taking me to jail, I can and will make you suffer, even to the extent of losing your office."
By this time Billy Brackett was standing up, while Bim, reluctantly obeying his stern command, lay motionless at his feet. The men of the Sheriff's posse had ceased to level their guns at the young engineer, and even Mr. Riley was so impressed with this bold attitude and declaration of innocence that he consented to come inside the hut and examine the papers offered for his inspection. He was about to declare his satisfaction with them, and admit that perhaps he had made a mistake, when the man whom he had left to guard Winn rushed up with the announcement that his prisoner had escaped.
At this the Sheriff's face clouded angrily. "We'll find him if he is still on the island!" he exclaimed. "If he has left it we'll follow him; and, at any rate, Mr. Brackett, I must now insist upon your coming to Dubuque, where you will be granted every opportunity for proving what you please. In the mean time, you and I will await here the result of the search for the escaped prisoner that my men will at once proceed to make."
To this Billy Brackett returned no answer, but stood silently considering how he should avoid the vexatious delay that now appeared inevitable. While he was thus cudgelling his brains, one of the searching party returned to report that the skiff in which they had come up the river was missing.
The Sheriff became furious. "I don't believe it!" he cried. "Here, you! Stop and guard this prisoner, while I go and take charge of the search myself."
As Mr. Riley departed, the new guard entered the hut, leaned his rifle against the wall, and took a seat near the door.
Then Billy Brackett stooped and whispered to his ever-faithful comrade, "Watch him, Bim!" and the dog answered with a low growl that spoke volumes. Turning to the guard the young engineer said, "My friend, if you make the slightest motion or shout for help, that bull-dog will fly at your throat. I am going to leave you alone with him for a minute, and as you value your life, I beg of you to keep perfectly quiet until you hear from me." With this the prisoner leaped lightly from the window and disappeared.
